package com.wallpaper.setting.launcher.util;

import android.app.WallpaperManager;
import android.content.Context;
import android.graphics.drawable.Drawable;
import android.os.Build;

public class AppUtil {

	private volatile static AppUtil mInstance;

	private AppUtil() {

	}

	public static AppUtil getInstance() {
		if (mInstance == null) {
			synchronized (AppUtil.class) {
				mInstance = new AppUtil();
			}
		}
		return mInstance;
	}

	public Drawable getWallpaper(Context ctx) {
		return WallpaperManager.getInstance(ctx).getDrawable();
	}

	public int getVersionCode() {
		return Build.VERSION.SDK_INT;
	}

	/**
	 * 根据手机的分辨率从 dp 的单位 转成为 px(像素)
	 */
	public static int dip2px(Context context, float dpValue) {
		final float scale = context.getResources().getDisplayMetrics().density;
		return (int) (dpValue * scale + 0.5f);
	}

	/**
	 * 根据手机的分辨率从 px(像素) 的单位 转成为 dp
	 */
	public static int px2dip(Context context, float pxValue) {
		final float scale = context.getResources().getDisplayMetrics().density;
		return (int) (pxValue / scale + 0.5f);
	}

}
